---Where ______ the students?---They are having lunch in the dining hall.
----- I don’t think waste water should be put into the rivers or lakes. ----_____.It will cause much water pollution.
--- Oh, Jack’s not here these days. Is he ill? ---________. His mother told me that he was in hospital.
-- How about going shopping on Renmin Road this evening? --- ______,but I have to prepare for tomorrow’s exam.
----Your monitor is never late for school, is he? --- ______.He always comes to school earlier than others.
---Are Mr. and Mrs. Wang living alone in the house? ---Yes, they have three sons, but ______ of them live in their own houses.